Lots of little electronics, like cell phone, cameras, etc, have nice power supplies that produce 5 volts DC from household 120V AC. Some are pretty small little packages. I'm looking for a small sized unit that I could add to my pcbboard to get 5 volts to run my Arduino project, and be fed off of 120 V AC. Do they make such things as this? I've searched. Around quite a bit and haven't come up with anything. (I only need like 200-500 mA).
I can take apart one of these adapters made for a cell phone, but if there was a genuine product that I could use, so I'd know I could get more just like it if I needed to.
Thanks.
Something like this?
Available at mouser.com supposedly.
5V, 800mA, $18.89 qty 1
45m x 55mm
"The RAC04 series is an ultra-compact universal input
AC/DC power module for PCB mounting.
It features ultralow no-load power consumption, short
circuit, overload and output overvoltage protection as
well as a built-in EMC Class B filter."
Just add 1A slow blow fuse and optional output filtering caps, 0.1uF and 47uF.
The OP (me) searched for an hour, or two. Different occasions, and came up dry. And within 15 minutes after I ask, I get another excellent answer!
PLUS 1 to Crossroads, again!
I'm looking for a small sized unit that I could add to my pcbboard to get 5 volts to run my Arduino project, and be fed off of 120 V AC.
Please, just be careful with the high voltage! Try to insulate the AC, so you can touch the board when it's running without killing youself...
I won't say, never put the power supply on the same board as your low-voltage circuitry, but it's something I'd try to avoid (if you have the space, etc.).
Most manufacturer's (not all) will put the power supply on a separate circuit board, sometimes with an extra cover over it so you can open the case and touch stuff safely... It only gets dangerous when you start messing with the power supply section. I assume you've looked inside a computer and noticed that the power supply is in it's own box and you can't get shocked unless you open the power-supply.
Another "trick" of manfacturers is to use a "wall wart" supply. Most of us hate that (unless it's a just a charger), but the manufacturers like it because they can buy a regulatory-approved power supply from a 3rd-party and they don't have to go through the time delay & expense of getting their low-voltage product approved by the safety agencies (not an issue for home-builders). And, they can update their designs, and use the existing power supply without going through an approval cycle.
I work for a small electronics manufacturer. Most of our products use wall-warts, but a couple have one big circuit board the AC power supply on it. I've been "zapped" a few times, because I have bad habits from working on low-voltage stuff all the time... But, I havent been killed yet! 
5V, 800mA, $18.89 qty 1
45m x 55mm"The RAC04 series is an ultra-compact universal input
AC/DC power module for PCB mounting.
It features ultralow no-load power consumption, short
circuit, overload and output overvoltage protection as
well as a built-in EMC Class B filter."Just add 1A slow blow fuse and optional output filtering caps, 0.1uF and 47uF.
Interesting. So basically a wall wart that can be PCB mounted. Years ago, I'd build my own supplies for most projects usually using 6V or 12V filament transformers. These days I use wall warts mostly. But there is the occasional need for 120VAC in addition to the logic supplies.
Thanks. I usually use a switching wall wart, too. I'm quite familiar with household wiring, so it shouldn't be a problem. The project I have in mind is kinda like:
Only the whole Arduino circuitry and everything will be in a small enclosure about the same size, (along with a Bluetooth chip so I can control it from my phone)
Which brings me to another question about relays, but maybe I should post it in a new thread.